Design of Magnetic Actuator Intended for Artificial Heart Drive

With the goal of developing an artificial heart, a linear motion magnetic actuator has been produced and applied to a pump. The actuator is composed of two ring-shaped Nd-Fe-B magnets that face each other, the outer and inner diameters and thickness of which are 63mm, 17mm and 3mm, respectively. Rotating one of the magnets circumferentially via a motor produces reciprocating forces on the other magnet. The pumping motion is performed using the power of the reciprocating magnet. Because the actuator uses no windings, no copper loss, which causes heat generation in the body, is generated. The output powers of the actuator and the pump reached 1.03W and 0.65W, respectively.